Roblox allows users to replace the head decals of Roblox characters with unique faces and designs. For purchasing Roblox faces, you have to go to the ‘catalogue‘ option, then go to the ‘body parts‘ option on the left-hand side.
For creating & making custom Roblox faces and selling them to earn some Robux, players should have a membership of the Roblox Builders Club.
After successfully uploading the customized Roblox face, you can sell the same and earn some Robux.